Extensor pollicis brevis
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Related Anatomy
Nerve
Posterior interosseous nerve
Radial nerve
Plexus
Brachial plexus
Muscle Group
Radial nerve - Finger & thumb extensors
Muscle Action
Thumb metacarpalphalangeal joint extension
Nerve Root
C8
C7
Brachial Plexus Trunk
Lower trunk
Middle trunk
Brachial Plexus Division
Posterior division